attr.h

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/* 
   Unix SMB/CIFS implementation.
   Samba utility functions
   Copyright (C) Jelmer Vernooij <[e-mail]> 2007
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef __UTIL_ATTR_H__
#define __UTIL_ATTR_H__

#ifdef __GNUC__
/** gcc attribute used on function parameters so that it does not emit
 * warnings about them being unused. **/
#  define UNUSED(param) param __attribute__ ((unused))
#else
#  define UNUSED(param) param
/** Feel free to add definitions for other compilers here. */
#endif

#ifdef HAVE_VISIBILITY_ATTR
#  define _PUBLIC_ __attribute__((visibility("default")))
#else
#  define _PUBLIC_
#endif

#ifndef _DEPRECATED_
#if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
#define _DEPRECATED_ __attribute__ ((deprecated))
#else
#define _DEPRECATED_
#endif
#endif

#ifndef _WARN_UNUSED_RESULT_
#if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
#define _WARN_UNUSED_RESULT_ __attribute__ ((warn_unused_result))
#else
#define _WARN_UNUSED_RESULT_
#endif
#endif

#ifndef _NORETURN_
#if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1 )
#define _NORETURN_ __attribute__ ((noreturn))
#else
#define _NORETURN_
#endif
#endif

#ifndef _PURE_
#if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1)
#define _PURE_ __attribute__((pure))
#else
#define _PURE_
#endif
#endif

#ifndef NONNULL
#if (__GNUC__ >= 3) && (__GNUC_MINOR__ >= 1)
#define NONNULL(param) param __attribute__((nonnull))
#else
#define NONNULL(param) param
#endif
#endif

#ifndef PRINTF_ATTRIBUTE
#if __GNUC__ >= 3
/** Use gcc attribute to check printf fns.  a1 is the 1-based index of
 * the parameter containing the format, and a2 the index of the first
 * argument. Note that some gcc 2.x versions don't handle this
 * properly **/
#define PRINTF_ATTRIBUTE(a1, a2) __attribute__ ((format (__printf__, a1, a2)))
#else
#define PRINTF_ATTRIBUTE(a1, a2)
#endif
#endif

#endif /* __UTIL_ATTR_H__ */